JPS62172799A - Electromagnetic wave shielding material - Google Patents
Electromagnetic wave shielding materialInfo
- Publication number
- JPS62172799A JPS62172799A JP61014388A JP1438886A JPS62172799A JP S62172799 A JPS62172799 A JP S62172799A JP 61014388 A JP61014388 A JP 61014388A JP 1438886 A JP1438886 A JP 1438886A JP S62172799 A JPS62172799 A JP S62172799A
- Authority
- JP
- Japan
- Prior art keywords
- metal foil
- graphite sheet
- flexible graphite
- electromagnetic
- shielding material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 29
- 229910002804 graphite Inorganic materials 0.000 claims description 28
- 239000010439 graphite Substances 0.000 claims description 28
- 239000011888 foil Substances 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 20
- 230000000694 effects Effects 0.000 description 16
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- MUBKMWFYVHYZAI-UHFFFAOYSA-N [Al].[Cu].[Zn] Chemical compound [Al].[Cu].[Zn] MUBKMWFYVHYZAI-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000004577 thatch Substances 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、？ｔｔ磁波を出して、いわゆる電磁波障害を
発生させる電子機器、たとえばＴＶ、タイプライタ−、
ＮＣ工作機１乗車券自動販売機、パソコン等に取付けら
れて電磁波エネルギーを反射。[Detailed Description of the Invention] [Industrial Application Field] What does the present invention cover? Electronic devices that emit tt magnetic waves and cause so-called electromagnetic interference, such as TVs, typewriters, etc.
NC machine tool 1 Attached to ticket vending machines, computers, etc. to reflect electromagnetic energy.
吸収し、これによってエネルギーの伝播を妨げ。absorbs and thereby prevents the propagation of energy.
伝播エネルギーを減衰させる電磁波シールド材に関する
ものである。This invention relates to an electromagnetic wave shielding material that attenuates propagated energy.
電磁波障害の防上は基本的には電子機器の回路設計によ
って行われるも０であるが、それだけでは電磁波の放射
を十分に防止することは困難である。従って、″２１ｉ
子ａ器のケースでＭｌ磁波をシールドし、外部へ放射し
ないようにすることが必要である。Although electromagnetic interference is basically prevented by the circuit design of electronic equipment, it is difficult to sufficiently prevent the radiation of electromagnetic waves by this alone. Therefore, ``21i
It is necessary to shield the Ml magnetic waves in the case of the sub-unit so that they do not radiate to the outside.
しかし、現在の電子機器ケースの大部分はプラスチック
成形品であり、このプラスチック成形品は通常、電気絶
縁体であるため、電磁波のシールド機能を全く有してい
ない、そこで上記プラスチック成形品にシールド材を取
付けることが行われている。However, the majority of current electronic device cases are made of plastic molded products, and since these plastic molded products are usually electrical insulators, they have no electromagnetic wave shielding function at all. is being installed.
また最近では、導電性物質（導電性プラスチックや金網
等）にて予め電磁波シールドを施したところの用途とし
て１例えば、コンピユータ室のドアや建屋の窓・排気孔
等の開口部或いは金属ケースの開閉部の用途等では、電
磁波シールド手段を施しているにも拘わらず、電磁波シ
ールド部分の隙間から電磁波が洩れる問題があり、係る
隙間部分を埋める電磁波シールド材は、電磁波シールド
用補助材料（部材）と称されるが、このような電磁波シ
ールド材では、本来の電磁波シールド機能の他に、（１
）隙間を埋める密封性を有する点。Recently, electromagnetic shielding with conductive materials (conductive plastic, wire mesh, etc.) has been applied in advance to applications such as openings such as computer room doors, building windows, exhaust vents, etc., or opening and closing of metal cases. In applications such as parts, there is a problem that electromagnetic waves leak from the gaps in the electromagnetic shield part despite the use of electromagnetic shielding means, and the electromagnetic shielding material that fills the gap is considered to be an auxiliary material (component) for electromagnetic shielding. However, in addition to the original electromagnetic shielding function, such electromagnetic shielding materials have (1
) Points that have sealing properties that fill gaps.
（２）厚さを大きくとれる材料である点、（３）圧縮復
元性を有する点等が必要とされ、これらの条件九
を廠足し得る補助材料としての電磁波シールド材はない
というのが現状である。(2) It must be a material that can be made thick, and (3) It must have compression recovery properties. Currently, there is no electromagnetic shielding material that can serve as an auxiliary material that can satisfy these conditions. be.
尚、周知の電磁波シールド材としては、導電性を有する
材料の殆どが使用回部と言われているものの、そのシー
ルド効果は、表１のように大きく異なっている。Although most of the known electromagnetic shielding materials are said to be conductive, their shielding effects vary widely as shown in Table 1.
表ま ただしく１）は厚さく一層）を示す。Table However, 1) indicates that the thickness is one layer.
に足表１の可撓性黒鉛シートとは、天然の黒鉛粒子を酸
処理したのち、原容積の少なくとも２５倍以上に膨張さ
せ１重畳する炭素積層間を開放したものを、接着剤、添
加剤を使用することなく、シート状に成形したものであ
る。このため、黒鉛本来の性質をそっくりそのまま保持
する上に、可撓性という従来の黒鉛に期待できなかった
特殊な性能を持つものである。The flexible graphite sheet shown in Table 1 is made by treating natural graphite particles with acid, expanding them to at least 25 times their original volume, and opening up the layers of carbon. It is molded into a sheet without using. For this reason, it not only retains all the original properties of graphite, but also has flexibility, a special performance that could not be expected from conventional graphite.
従って、可撓性黒鉛シートからなる電磁波シールド材は
、軽く柔軟性もあり切断曲げ加工が容易で、電子機器ケ
ースに凹凸があっても、その凹凸に沿って張り付けるこ
とができ、また表１から明らかなように、かなり良いシ
ールド効果を発揮するものである。しかし、その反面１
次のような問題点を有する。即ち、可撓性黒鉛シート０
．３８ｔのシールド効果と周波数との関係は第４図のよ
うになり、低周波域ではシールド効果がアルミ箔０．０
５ｔよりも低い、また曲げたり、切断したりして加工し
たときに、その加工部から黒鉛が剥離しやすく、ショー
トの原因となる。さらにアースをハンダ付けできないも
のである。Therefore, electromagnetic shielding materials made of flexible graphite sheets are light and flexible, and can be easily cut and bent.Even if an electronic device case has irregularities, it can be pasted along the irregularities. As is clear from this, it exhibits a fairly good shielding effect. However, on the other hand, 1
It has the following problems. That is, flexible graphite sheet 0
．． The relationship between the shielding effect of 38t and frequency is shown in Figure 4, and in the low frequency range the shielding effect is 0.0
When the weight is lower than 5t, graphite tends to peel off from the processed parts when it is bent or cut, causing a short circuit. Furthermore, it is not possible to solder the ground.
そこで本発明者は研究の結果、可撓性黒鉛シートに金属
箔を接着させれば、可撓性黒鉛シート特有の可撓性を損
なわず、しかも、上記問題点を解消することができるこ
とを見出した０本発明はかかる見地に基づくものである
。As a result of research, the inventor of the present invention found that by adhering metal foil to a flexible graphite sheet, the above-mentioned problems could be solved without impairing the flexibility peculiar to the flexible graphite sheet. The present invention is based on this viewpoint.
上記問題点を解決するため、本発明の電磁波シールド材
は、可撓性黒鉛シートの片面又は両面に金属箔を接着し
てなるものである。In order to solve the above problems, the electromagnetic shielding material of the present invention is made by adhering metal foil to one or both sides of a flexible graphite sheet.
］二足構成において、可撓性黒鉛シートは勿論のこと、
金属箔も可撓性を有するから、本発明の電磁波シールド
材を電子機器ケース茅の凹凸に沿って容易に張り付ける
ことができ、しかも低周波域から高周波域までの広範囲
の電磁波に対し、良好で安定的なシールド作用を示す。] In the two-leg configuration, of course the flexible graphite sheet,
Since metal foil is also flexible, the electromagnetic shielding material of the present invention can be easily applied along the unevenness of the thatch of an electronic device case, and is also effective against a wide range of electromagnetic waves from low frequency ranges to high frequency ranges. shows stable shielding action.
以下、本発明の第１の実施例を第１図に基づいて説明す
る。この実施例の電磁波シールド材は、可撓性黒鉛シー
）１の両面に金属箔２を接着してなるものである。金属
箔２は、アルミニウム、銅、亜鉛、鉄、ステンレス等を
圧延又は電解法で製作したものである。可撓性黒鉛シー
ト！と金属箔２とは接着剤で接着する。その接着剤とし
ては導電性のものを用いるのがもっともよい、導電性を
右しない接着剤の場合には、たとえば散点模様的に接着
剤で部分接着し、可撓性黒鉛シートｌと金属箔２とが絶
縁されないようにする必要がある。A first embodiment of the present invention will be described below with reference to FIG. The electromagnetic shielding material of this embodiment is made by adhering metal foils 2 to both sides of a flexible graphite sheet 1. The metal foil 2 is made of aluminum, copper, zinc, iron, stainless steel, etc. by rolling or electrolytic method. Flexible graphite sheet! and metal foil 2 are bonded together with an adhesive. It is best to use an electrically conductive adhesive. If the adhesive is not conductive, for example, it can be partially bonded with adhesive in a dotted pattern, and the flexible graphite sheet l and metal foil are bonded together. It is necessary to ensure that there is no insulation between the two.
可撓性黒鉛シートｌの厚さは０．１ｍ■以上、３厘−以
下である。０．１＋ｓｍ以下ではシールド効果が小ざく
、３ｗ■以上では可撓性が悪くなる。金属箔２の厚さは
０．０１ ｔｓ■以上、０．１！１重以下である。The thickness of the flexible graphite sheet 1 is 0.1 m or more and 3 m or less. If it is less than 0.1+sm, the shielding effect will be small, and if it is more than 3w, the flexibility will be poor. The thickness of the metal foil 2 is 0.01 ts or more and 0.1!1 ts or less.
０．０１ｍｍ以下では低周波域でのシールド効果が小さ
くなり、０．１ｍｍ以上では可撓性が悪くなる。If it is 0.01 mm or less, the shielding effect in the low frequency range will be small, and if it is 0.1 mm or more, the flexibility will be poor.
上記第１の実施例では、可撓性黒鉛シート！の両面に金
属箔２を接着させたが、第２図に示す如く、その片面に
だけ金属箔２を接着させてもよい。In the first embodiment above, a flexible graphite sheet! Although the metal foil 2 is bonded to both sides of the metal foil 2, the metal foil 2 may be bonded to only one side as shown in FIG.
〔第２の実施例〕
第１の実施例に基づいて、可撓性黒鉛シート０．３８ｔ
にアルミ箔０．０５ｔを両面接着したもの（Ａ）と、第
２の実施例に基づいて、可撓性黒鉛シート０．３８ｔに
アルミ箔０．０５ｔを片面接着したもの（Ｂ）のシール
ド効果と周波数の関係は第３図のようになる。この第３
図から明らかなように、可撓性黒鉛シートとアルミ箔と
の相乗効果により、低周波域から高周波域まで広い範囲
で優れたシールド効果を示している。[Second Example] Based on the first example, a flexible graphite sheet of 0.38t
Shielding effect of 0.05t of aluminum foil adhered on both sides (A) and 0.05t of aluminum foil adhered on one side to flexible graphite sheet 0.38t based on the second example (B) The relationship between and frequency is shown in Figure 3. This third
As is clear from the figure, due to the synergistic effect of the flexible graphite sheet and the aluminum foil, excellent shielding effects are exhibited over a wide range from low frequency ranges to high frequency ranges.
また可撓性黒鉛シートｌを金属箔２で補強しているので
１曲げたり切断したりして加工しても、その加工部から
黒鉛が剥離しないものである。従って、従来のように加
工部から黒鉛が剥離してショートの原因となることはな
い、そして、アースを金属箔２にハンダ付けすることが
できる。さらに電子機器ケース等の凹凸に沿って容易に
曲げて張り付けることができるものである。Furthermore, since the flexible graphite sheet 1 is reinforced with the metal foil 2, even if it is bent or cut, the graphite will not peel off from the processed portion. Therefore, the graphite does not peel off from the processed portion and cause a short circuit as in the conventional case, and the ground can be soldered to the metal foil 2. Furthermore, it can be easily bent and pasted along the unevenness of an electronic device case or the like.
（発明の効果〕
以上述べた如く、本発明によれば、可撓性黒鉛シートは
勿論のこと、金属箔も可撓性を有するから、電磁波シー
ルド材を電子機器ケース等の凹凸に沿って容易に張り付
けることができる。また黒鉛シートの問題点であった低
周波域でのシールド効果の低さを金属箔のシールド効果
により改善するものであって、両者の相乗効果により低
周波域から高周波域まで広い範囲で優れたシールド効果
を得ることができるものである。しかも、本発明に係る
電磁波シールド材は、全体として軽く、厚さを大きくと
れ、柔軟性もあり、かつ圧縮復元性に優れているので、
電磁波シールド用補助材としての電磁波シールド材とし
ても充分に適用でき、優れた効果を示す、そして、可撓
性黒鉛シートを金属箔で補強しているので、曲げたり切
断したりして加工しても、その加工部から黒鉛が剥離し
ないものである。従って、従来のように加工部から黒鉛
が剥離してショートの原因となることはない、さらにア
ースを金属箔にハンダ付けすることができる。(Effects of the Invention) As described above, according to the present invention, since not only the flexible graphite sheet but also the metal foil has flexibility, the electromagnetic shielding material can be easily applied along the unevenness of the electronic device case, etc. In addition, the problem with graphite sheets, which was the low shielding effect in the low frequency range, is improved by the shielding effect of the metal foil, and the synergistic effect of the two improves the shielding effect from the low frequency range to the high frequency range. Moreover, the electromagnetic shielding material according to the present invention is light overall, can be thickened, has flexibility, and has excellent compression and recovery properties. Because
It can be fully applied as an electromagnetic shielding material as an auxiliary material for electromagnetic shielding, and it shows excellent effects.The flexible graphite sheet is reinforced with metal foil, so it can be processed by bending or cutting. Also, graphite does not peel off from the processed part. Therefore, the graphite does not peel off from the processed part and cause a short circuit as in the conventional case, and furthermore, the ground can be soldered to the metal foil.
第１図は本発明の第１の実施例を示す斜視図、第２図は
本発明の第２の実施例を示す斜視図、第３図は第１．第
２の実施例による具体例のシールド効果と周波数との関
係を示すグラフ、第４図は従来例のシールド効果と周波
数との関係を示すグラフである。
ｌ・・・可撓性黒鉛シート
２・・・金属箔
特許出願人 日本ピラー工業株式会社代 理 人
弁理士 鈴江 孝−、入−ご１．寡婦
、ｈ−９狐１ｇ賑侶1 is a perspective view showing a first embodiment of the invention, FIG. 2 is a perspective view showing a second embodiment of the invention, and FIG. 3 is a perspective view showing a second embodiment of the invention. FIG. 4 is a graph showing the relationship between the shielding effect and frequency of the specific example according to the second embodiment, and FIG. 4 is a graph showing the relationship between the shielding effect and frequency of the conventional example. l...Flexible graphite sheet 2...Metal foil patent applicant Nippon Pillar Industries Co., Ltd. Representative Patent attorney Takashi Suzue, please enter 1. Widow, h-9 fox 1g bustling
Claims (1)
なる電磁波シールド材。An electromagnetic shielding material made by adhering metal foil to one or both sides of a flexible graphite sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61014388A JPS62172799A (en) | 1986-01-24 | 1986-01-24 | Electromagnetic wave shielding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61014388A JPS62172799A (en) | 1986-01-24 | 1986-01-24 | Electromagnetic wave shielding material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62172799A true JPS62172799A (en) | 1987-07-29 |
| JPH0240240B2 JPH0240240B2 (en) | 1990-09-10 |
Family
ID=11859673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61014388A Granted JPS62172799A (en) | 1986-01-24 | 1986-01-24 | Electromagnetic wave shielding material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62172799A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005229100A (en) * | 2004-01-13 | 2005-08-25 | Japan Matekkusu Kk | Heat-dissipating sheet and heatsink |
| JP2007165415A (en) * | 2005-12-09 | 2007-06-28 | Japan Matekkusu Kk | Composite substrate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5315100U (en) * | 1976-07-20 | 1978-02-08 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5315100B2 (en) * | 1972-11-17 | 1978-05-22 |
-
1986
- 1986-01-24 JP JP61014388A patent/JPS62172799A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5315100U (en) * | 1976-07-20 | 1978-02-08 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005229100A (en) * | 2004-01-13 | 2005-08-25 | Japan Matekkusu Kk | Heat-dissipating sheet and heatsink |
| JP2007165415A (en) * | 2005-12-09 | 2007-06-28 | Japan Matekkusu Kk | Composite substrate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0240240B2 (en) | 1990-09-10 |
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